CAT 4D1326 LOCKWASHER for C18 Caterpillar Part - WSTPARTS
WSTPARTS supplies the 4D1326 LOCKWASHER, a CAT Bolt/Nut replacement part designed for Caterpillar C18, C15 and C9 applications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3306: OPERATOR STATION, group 103-4773, page 1765; C15: GENERATORS, group 235-1215, page 341.
4D1326 LOCKWASHER for Caterpillar C18 — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement LOCKWASHER (Part # 4D1326). Designed for CAT C18, C15, C9, G3608, G3612, G3616 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT C18, C15, C9, G3608, G3612, G3616
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT lines: New Genuine / Cat Reman / Cat Classic | OEM-equivalent direct replacements
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 4D1326 |
| Product Name | LOCKWASHER |
| Brand | CAT |
| Applicable Models | C18, C15, C9, G3608, G3612, G3616 |
| Weight | 0.05 kg |
| Condition | New (Genuine CAT / OEM-equivalent direct replacement) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 4D1326 in the Caterpillar parts manual: the machine it is published under, the system it belongs to, the group number and the manual page. Use it to confirm the part against your own parts book before ordering.
| Machine | System | Group No. | Manual Page |
| 3306 | OPERATOR STATION | 103-4773 | p.1765 |
| C15 | GENERATORS | 235-1215 | p.341 |
| C18 | ELECTRICAL AND STARTING SYSTEM | 304-6645 | p.746 |
| C9 | ELECTRICAL AND STARTING SYSTEM | 445-5763 | p.169 |
| G3608 | ELECTRICAL AND STARTING SYSTEM | 213-6282 | p.344 |
| G3612 | OPERATOR STATION | 195-6243 | p.209 |
| G3616 | ELECTRICAL AND STARTING SYSTEM | 206-5460 | p.578 |
| C18 | ELECTRICAL AND STARTING SYSTEM | 304-6646 | p.749 |
System Notes — OPERATOR STATION
The operator station covers the cab structure, seat and suspension, glass, wipers, door hardware, pedals, joysticks, armrests, HVAC ducting and the interior trim. It is the group that decides how tolerable a ten-hour shift feels. Wear here is driven by daily entry and exit, sun exposure and dust: seat suspensions sag, door struts lose charge, wiper linkages seize, and rubber seals harden until the cab leaks in rain. Parts in this group are replaced when a control feels vague, a latch no longer holds, or the cab no longer keeps dust and water out — small items, but the ones operators complain about first.
System Notes — GENERATORS
The generators group covers the alternator end of a generator set: stator, rotor, exciter, bearings, coupling disc, terminal box and the voltage regulation hardware. It converts engine rotation into electrical output at a held voltage and frequency. Bearing wear and insulation degradation are the two long-term concerns — a bearing that starts to rumble will eventually seize and take the rotor with it, while moisture and heat slowly break down winding insulation. Parts in this group are replaced when vibration rises, when insulation resistance falls on a megger test, or when output voltage becomes unstable under load.
FAQ
Is 4D1326 the right part for my machine?
Match the part number on your old part, or send us your equipment serial number — WSTPARTS verifies fitment free of charge for CAT C18.
Genuine CAT vs direct replacement — what is the difference?
Genuine CAT covers three factory lines: New Genuine, Cat Reman (core exchange with core charge) and Cat Classic (brand-new economy line). OEM-equivalent direct replacements are non-CAT parts; grade and warranty are confirmed in the quotation.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a warranty per quotation.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
